Galen has a customer who wants to be able to do estimates on his phone. Can he convert the program he's written to iOS? Leo says that writing a program to be portable is definitely doable, but to do it for Windows 10 is different than iOS processors. So he can't just convert it. On the other hand, we're moving in a direction that will allow him to do just that. How about a web interface? That can always be accessed from any mobile device. That would be his best bet. Galen should check out Progressive Web Apps.